OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:23:e9:bc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:7e:68:69:ea:de:51
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:96:02:71:a6:42:e7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:26:b6:af:95:35:01
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:23:e9:bc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
